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Transscleral filtration revealing a chorioretinal coloboma.

Authors :: Scemla B
Duroi Q
Duraffour P
Souedan V
Brézin AP
Source :: American journal of ophthalmology case reports [Am J Ophthalmol Case Rep] 2020 Dec 19; Vol. 21, pp. 101003. Date of Electronic Publication: 2020 Dec 19 (Print Publication: 2021).
Publication Year :: 2020
Abstract: Purpose: We report the case of a 19-year-old patient who presented with an ocular hypotony due to a transscleral filtration through an isolated congenital chorioretinal coloboma in his right eye.<br />Observations: The initial examination showed a decimal best corrected visual acuity (BCVA) decreased to 0.7 and a marked hypotony. A localized infero-nasal chemosis and a conjunctival hyperemia were observed. The fundus examination showed chorioretinal folds and an edematous disc. In the infero-nasal retinal periphery, a chorioretinal coloboma was seen with a full-thickness scleral defect. Ultrasound biomicroscopy showed the area of the coloboma through which the percolation of fluid occurred.<br />Conclusions and Importance: A favorable outcome was observed within 6 weeks and BCVA improved to 1.0 three months later. The intraocular pressure (IOP) increased to 11 mmHg, but the bleb-like filtration could still be seen together with some persistent chorioretinal folds. Ultrasound Biomicroscopy (UBM) imaging was helpful to understand the mechanism of this uncommon complication of a coloboma.<br />Competing Interests: The following authors have no financial disclosures: B.S.; Q.D; P.D.; V.S; A.B.<br /> (© 2020 The Authors. Published by Elsevier Inc.)